show that a force that the no works must be a velocity to depend force
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Force doesn't work . Means , work done = 0 by acting of force .
Let force is , displacement due to force act on body is .
So, W =
we also know,
⇒W = , but dt ≠ 0
so, ,
It is possible only when Force is perpendicular upon velocity . hence, force is dependent upon velocity. If velocity change the direction then force should be change the direction in such a way that angle is maintained at 90° .
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Let force is , displacement due to force act on body is .
So, W =
we also know,
⇒W = , but dt ≠ 0
so, ,
It is possible only when Force is perpendicular upon velocity . hence, force is dependent upon velocity. If velocity change the direction then force should be change the direction in such a way that angle is maintained at 90° .
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